Symmetry energy of fragments produced in multifragmentation

D. Henzlova , A.S. Botvina , K.-H. Schmidt , V. Henzl , P. Napolitani (1) , M.V. Ricciardi

1 IPNO - Institut de Physique Nucléaire d'Orsay

Isospin properties of fragments measured in multifragmentation of $^{136}$Xe and $^{124}$Xe projectiles in mid-peripheral collisions with a lead target at 1 A GeV were studied within the statistical approach describing the liquid-gas nuclear phase transition. By analyzing the isoscaling phenomenon and the mean N-over-Z ratio of the fragments with Z=10-13 we have concluded that the symmetry energy of hot fragments produced at subnuclear densities at high temperatures decreases in comparison with cold nuclei.

Mots clés: Symmetry energy; Isoscaling; Multifragmentation

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

D. Henzlova, A.S. Botvina, K.-H. Schmidt, V. Henzl, P. Napolitani, et al.. Symmetry energy of fragments produced in multifragmentation. Journal of Physics G: Nuclear and Particle Physics, 2010, 37 (8), pp.085010. ⟨10.1088/0954-3899/37/8/085010⟩. ⟨in2p3-00024375⟩